Omega TL-WELD Manuale utente
TL-WELD
Thermocouple and
Fine Wire Welder
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User’s Guide
MADE IN UNITED KINGDOM
Servicing North America:
U.S.A.: Omega Engineering, Inc., One Omega Drive, P.O. Box 4047
Stamford, CT 06907-0047 USA
Toll-Free: 1-800-826-6342 (USA & Canada only)
Customer Service: 1-800-622-2378 (USA & Canada only)
Engineering Service: 1-800-872-9436 (USA & Canada only)
Tel: (203) 359-1660 Fax: (203) 359-7700
e-mail: [email protected]
For Other Locations Visit omega.com/worldwide
omega.com [email protected]
The information contained in this document is believed to be correct, but OMEGA accepts no liability for any errors it
contains, and reserves the right to alter specifications without notice.
CONTENTS
Page
2Operating Instructions
3Accessories
4Front Panel Controls
5Rear Panel Controls
5Setting Up Procedure
6Welding Instructions
7Energy Settings
7Electrodes
8Maintenance
- 1 -
THERMOCOUPLE AND FINE WIRE
WELDER
TL-WELD
Operating Instructions
The TL-WELD welder is designed for sensor manufacturers
to produce commercial grade thermocouple junctions, and by
users of large numbers of exposed junction thermocouples
such as test and development laboratories where multipoint
temperature sensing of test pieces is required.
No special skills are required and most people will be capa-
ble of producing quality work with minimal practice. A sat-
isfactory thermocouple junction is produced without using
argon, but where argon is available a momentary purge is
automatically triggered immediately prior to the weld to
give optimum weld integrity.
Safety Note
1. Always protect the eyes with a suita- ble
filter during welding – never view the
weld discharge with the naked eye.
2. Avoid touching the rear of the welder during operation
as the power switch heat sink may run hot. This is a
normal operating condition.
3. Do not allow the hand to directly contact the welding
electrode during operation.
- 2 -
Accessories
Standard: Wire Holding Pliers With Lead
Safety Glasses
Magnifying Eyeglass
Spare Carbon Electrode
Spare 2A Fuse
Argon Hose
Hexagon key (for electrode change)
Mains Lead
Footswitch (Allows One Handed
Operation)
Optional: Spare Carbon Electrodes
- 3 -
Front Panel Controls
A. Arc Argon gas and weld current controlled by
the “Weld” switch. LED indication.
B. Purge Allows the gas line and electrode shield to
be purged of air prior to a new welding period.
C. Weld Switch Initiates a welding operation (in “arc” mode
also opens the Argon valve).
D. Argon LED Indicates when the Argon control valve is open
and gas is flowing.
E. Wait LED Glows when weld charge is building.
F. Ready LED “Ready to Weld” indication.
G. Power Rotary control of the capacitor charge voltage.
H. Level selector Selects the total capacitance available giving
the following values with LED indication.
“LO” = 0 to 6 Joules
“MED” = 0 to 28 Joules
“HI” = 0 to 64 Joules
I. Electrode Holder Holds the replaceable carbon electrode which
is accessible by removing the outer Argon
Shield.
J. Red socket Output socket for using the pliers supplied.
K. Black socket Output socket, this provides an additional earth.
point if required.
- 4 -
Rear Panel Controls
A. ON/OFF switch Power to instrument ON/OFF
B. Weld jack socket Footswitch connection
C. Argon inlet For connection to Argon supply
D. IEC power inlet module For selection of 110-120 Vac or 220-
250 Vac power supply. Factory default
setting 220-250 Vac.
Setting Up
1. Using a suitable connector fused at 5 amps, connect to mains
supply.
2. If Argon is to be utilised, couple argon hose to rear of welder.
Do not over-tighten as a good seal will be made with the nut
slightly more than finger tight.
3. Connect free end of argon hose to the argon supply via an argon
flow regulator.
4. Switch on.
5. Hold welding mode switch in “purge” position and adjust argon
flow to 8 litres per min.
The apparatus is now ready for use.
- 5 -
D
Welding
Arc Welding
1. Connect the work-holding pliers to the red output
socket.
2. Depress the purge switch for 3 or 4 seconds to rid the
system of air.
3. Reset the mode to “Arc”.
4. Set the energy level to the desired value.
5. Prepare the wires to be welded and grip in the pliers,
leaving about 1mm or more protruding.
6. Position the wires 5 or 6mm in front of the carbon,
whilst steadying the hand.
7. Press the “weld” switch or foot switch and slowly
move the work towards the carbon until the arc is
struck.
8. Release the switch and remove the work for examina-
tion.
Preparation of Wires for Arc welding
For small diameter wires, strip off about 12mm of insula-
tion and twist together. Then, with side cutters or scissors
cut the wire off square leaving sufficient un-insulated
material to give approximately 1mm protruding when
gripped in the welding pliers. Larger diameter wires may
be held side by side in the welding pliers, but ensure that
they are in firm contact with each other and trimmed off
square. This method will be found useful for attaching
solid leads to resistance thermometer detectors. However,
when attaching stranded leads, it will be found more con-
venient to use the twisting method and then to carefully
untwist after welding.
- 6 -
Energy Settings
Arc Welding
The following settings may be used as a guide. The correct
setting for a particular metal combination and wire gauge will
produce a spherical bead. A flattened bead indicates that the
energy setting is too high.
Wire Diameter (mm)
Switch at “LOW” 0.1 Switch at “HIGH” 0.3
0.15 0.5
0.2 0.7
0.25 0.8
Electrodes
To replace or adjust carbon electrode, first turn the welder on
its side and slacken screw on base of argon shield, which may
be then pulled off. This reveals grub screw which holds car-
bon electrode in place.
- 7 -
Maintenance
Apart from keeping the electrode in good order, no other
maintenance is required.
Specifications
General
Energy Output 0-60 Joules
Welding Capacity Wires up to 1.1mm diameter
Duty Cycle Minimum 5-10 welds/min
Weld Voltage 49 V
Mechanical
Physical Dimensions 220mm Wide x 120mm High x
250mm Depth
Weight 4kg
Electrical
Power Supply 110-120 Vac or 220-250 Vac,
50-60Hz
Power Consumption Max 170VA dropping to 20VA
during charging
Fuse Characteristics 12A/250V
All information given is correct at time of going to press.
Please note that specifications and availability of certain
items may be subject to change.
- 8 -
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